Adjustable chair.



E. T. WILLIAMSON.

ADJUSTABLE CHAIR.

APPLICATION FILED OCT-2,1914.

' 1,173,075. Patented Feb. 22, 1916.

2 SHEETS-SHEET I.

Whine 50% E. T. WILLIAMSON.

ADJUSTABLE CHAIR.

' APPLICATION FILED 0CT.2.1914.

1,173,075. Patented Feb. 22, 1916.

2 SHEETS-SHEET 2.

gnvem Lo;

ELWEARD '1. WILLIAMSON, OF PITTSBURG, KANSAS.

ADJUSTABLE CHAIR.

Specification of Letters Patent.

Patented Feb. 22, 1916.

Application filed October 2, 1914. Serial N 0. 864,602.

To all whom it may concern Be it known that I, ELWEARD T. VVILLIAM- soN,a citizen of the United States, residing at Pittsburg, in the county ofCrawford and State of Kansas, have invented certain new and usefulImprovements in Adjustable Chairs; and I do hereby declare the following to be a full, clear, and exact description of the invention, such aswill enable others skilled in the art to which it appertains to make anduse the same.

This invention relates to, adjustable chairs, and one of the principalobjects of the invention is to provide reliable and efficient means foradjusting the back relatively to the seat at various inclinations andfor holding the back when adjusted, said means being operative by apress button at one arm of the chair.

Another object of the invention is to pro vide means for adjusting theinclination of the back of a chair comprising a spring actuated boltwhich holds the back in adjusted position, and a push button and rodwhich operates the bolt to withdraw the same and to permit the back tobe adjusted at the desired inclination when the bolt is again engaged tohold the chair in said adjusted position.

The foregoing and other objects may be attained by means of theconstruction illustrated in the accompanying drawings, in which,

Figure 1 is a vertical section through the seat portion of the chair andshowing the mechanism for holding the back in an adjusted position, Fig.2 is a plan view of the same, Fig. 3 is a vertical section through onearm of the chair, and showing the mechanism for operating the springbolt for holding the back in adjusted position, Fig. 4: is a detail viewshowing the connection of the sliding bars to back of the chair, andFig. 5 is a perspective view of the guide frame for the sliding bar.

Referring to the drawings, the numeral 1 designates the front legs ofthe chair and 2 are the back legs thereof, while 3 is the right arm ofthe chair and 4 is the left arm thereof, supported upon the upper endsof the legs 1 and 2. The seat frame consists of four bars forming arectangular frame comprising the side bars 5 and the front bar 6 and theback bar 7. Connected to the inner side near the bottom of the seatframe is a guide frame for the sliding bar, said guide frame comprisinga piece of metal bar bent upon ltself to form the rectangular portion 8whlch 1s secured by a bolt 9 to the front bar 6 of the seat frame andsaid guide frame comprising the parallel members 10 and the outwardlyspaced arms 11, said members 11 having outwardly turned feet 12 boltedto the back members 7 of the seat frame.

The back 13 of the chair is hinged at 15 and extending up the center ofthe back is a brace or support 16, said brace extending down below thelower end of the back and secured centrally thereto is a bearing memberor block 17 having spaced arms 18. Pivoted between the spaced members 18on a pin 19 is the sliding bar 20, said bar being spaced between themembers 18 by suitable washers 21. The sliding bar 20 is provided with aseries of hole or apertures 22 which are adapted to be brought intocoincidence with the apertures 23 in the parallel members 10. Thesliding bar 20 is disposed between the parallel members 10 and springs24 are connected to the bar 20 at 25 and the opposite end of saidsprings are connected at 26 near the top of the frame seat.

A vertical. push rod 27 extends down through a wooden brace member 28,and has a push button 29 upon its upper end. The lower end of the pushrod 27 terminates in a recess 30 in the member 5, and is adapted to bearupon an elbow lever 31 pivoted at 32 in a block 33 secured by bolts 34to the Seat rail or member 5. The arm 31 of the elbow lever 31 haspivoted to it a bolt 35, the end 36 of which is offset from the plane ofthe bolt 35. The end 36 of the bolt is mounted in the aperture 23 in thespaced members 10 and adapted to engage any one of the apertures orperforations 22 in the sliding bar 20. The bolt extends above theupwardly projecting bracket 33 and for holding the bolt projected, aspring 38 is connected at 39 to the bolt and the opposite end of saidspring is connected at 40 to the side member 5 of the seat frame. Theoperative parts of the mechanism are located at the lower portion of theseat frame and a cushion is adapted to cover said parts and to beremoved to render them easy of access in case of repairs.

The operation of the invention may be briefly described as follows: Whenthe push rod 27 is pressed by means of the press button 29 engaged bythe finger of the user, the

end 36 of the bolt is Withdrawn slightly from the sliding member 20 andthe springs 24 then pull upon said bar 20 and have a tendency to pullthe back up into vertical position. When the back of the user leansagainst the back of the chair and adjusts the desired inclination ofsaid back, and the button 29 is released, the bolt will shoot in by theaction of the spring 38 into the alined apertures in the sliding bar andthe guides 10, and thus hold the back at the in clination desired.

From the foregoing it will be obvious that the chair back can be readilyadjusted to any desired inclination by merely pressing upon the button29 and leaning back on the chair to get the desired inclination when byrelease of the button the back of chair is held in the desired inclinedposition.

Various changes may be made in the details of construction Withoutdeparting from the spirit and scope of the invention as, defined in theclaim.

What is claimed is 1- In a chair, the combination, with the frame, ahinged back and a sliding spring bolt, of a sliding bar havingbolt-receiving perforations, spring members for holding said sliding baragainst the under side of the chair frame, and a guide framerigidlysecured to the front and back bars of the chair frame.

In testimony whereof I afiix my signature in presence of tWo Witnesses.

ELVEARD T. VILLIAMSON.

W'itnesses:

LEO J. MGKENNA,

AMIEL PIERCE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents Washington, D. G.

